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Tobacco Smoking clinical trials

The registry lists 264 studies for Tobacco Smoking across more than 10 countries. 42 are recruiting or about to start. 142 of them are mainly about Tobacco Smoking (how this is decided). Per ClinicalTrials.gov, last updated 2026-11-13. Counting its narrower condition Cigarette Smoking too: 696 studies, 123 open.

Get an email when these change. Save the Tobacco Smoking studies recruiting or about to start — once a week, free: studies that open, close, add sites or post results.

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Example · made-up studies

Breast cancer · Recruiting: 2 came in, 3 changed

What changed in your saved searches, Oct 31 – Nov 6:

A study of drug A after surgery for early breast cancer

Came in · now Recruiting

Drug B with hormone therapy in advanced breast cancer

Changed

· Sites: 4 added, including Seoul and Busan

· Enrollment: 300 → 450 participants

Exercise during chemotherapy

Now Active, not recruiting

One email a week for all your saved searches. Stop any time.

Status

Completed
177
Recruiting
33
Status unknown
20
Active, not recruiting
12
Terminated
8
Not yet recruiting
7

Phase

Phase 4
15
Phase 2
13
Phase 1
10
Phase 3
7
Early Phase 1
2

Where

United States
185
Turkey
8
United Kingdom
7
Canada
6
France
5
Italy
3

Who runs them

RAI Services Company (29) · Johns Hopkins University (10) · University of California, San Francisco (8) · Juul Labs, Inc. (8) · Massachusetts General Hospital (8) · Wake Forest University Health Sciences (5) · University of Houston (5) · University of Minnesota (4)

What is being tested here

Drugs under test in Tobacco Smoking studies, those with the most open studies first. Medicines only given beside them are not counted. How drugs are counted

DrugOpenPhase 3All
Cannabidiol303
Varenicline226
Bupropion103
Cytisine101
Nicotine Lozenge101
Nicotine007
Nicotine Patch003
Nicotine Chewing Gum001
Nivolumab001
Ketamine001

Coming up

2phase 3 studies under way
18studies finish main data collection within a year

Studies recruiting or running, from their records. “Main data collection” ends at the primary completion date, the sponsor’s own estimate, which often moves.

The 10 nearest

Who these studies take

Of the 33 Tobacco Smoking studies recruiting now, 15 (45%) set no upper age limit and 16 (48%) stop at 75 or younger. 2 (6%) take children under 18. 2 (6%) are for women only and 0 (0%) for men only; 16 (48%) take healthy volunteers.

Recruiting studies that take each age, of 33
AgeWomenMen
100 (0%)0 (0%)
1825 (76%)23 (70%)
3030 (91%)28 (85%)
4030 (91%)28 (85%)
5029 (88%)28 (85%)
6527 (82%)26 (79%)
7518 (55%)17 (52%)
8517 (52%)16 (48%)

Across all 264 studies, recruiting or not: 50% stop at 75 or younger and 44% at 65; 9% take children; 3% are for women only and <1% for men only; 67% take healthy volunteers. From each study’s registry entry; the criteria on its page decide.

How long Tobacco Smoking studies take

Of 151 interventional studies with no phase under Tobacco Smoking, half reached primary completion within 16 months of starting, counting those still running.

Start to primary completionEvery sponsorIndustryNon-industry
Interventional, no phase16 mo4–29 · 151 studies2 mo1–4 · 39 studies24 mo13–35 · 112 studies
Observational36 mo3–112 · 16 studies——

Each figure is the month by which half the studies had reached primary completion, with the range in which the middle half did. Studies still running count until their last registry update; studies that stopped early are left out. Phase 1 includes early phase 1; observational means prospective or not stated, as retrospective and cross-sectional studies date a window of data rather than a study. How these figures are worked out

What changed recently

From the registry's own updates since Oct 15, 2026.

Results posted1

Newly registered3

Studies

Recruiting first, then most recently updated. Showing 50 of 264. Browse all 264 → or search them.